Disconnect/connect battery ground line - AR54.10-P-0003EW

MODEL 207, 212, 218 

Model 207, 212.1/2, 218 

Model 212.0 except engine 273 up to model year 2011 

Model 212.0 with engine 273 as of model year 2011 

Fig 1: Identifying On-Board Electrical System Battery, Tensioning Springs, Air Duct, Nut And Ground Cable

Courtesy of MERCEDES-BENZ USA

Model 212.0 with engine 273 up to model year 2011 

Fig 2: Identifying On-Board Electrical System Battery, Cover, Nut And Ground Cable

Courtesy of MERCEDES-BENZ USA

	Disconnect, connect
	Risk of explosion  caused by oxyhydrogen gas. Risk of poisoning and caustic burns  caused by swallowing battery acid. Risk of injury  caused by burns to skin and eyes from battery acid or when handling damaged lead-acid batteries	No fire, sparks, open flames or smoking. Wear acid-resistant gloves, clothing and glasses. Only pour battery acid into suitable and appropriately marked containers.	AS54.10-Z-0001-01A
	Notes on battery		AH54.10-P-0001-01A
	Notes on AGM battery		AH54.10-P-0002-01A
1.1	Unclip clamping springs (1) and remove air duct (2)	Model 207, 212.1/2, 218 Model 212.0 except engine 273 up to Model year 2011 Model 212.0 with engine 273 as of model year 2011 Installation:  pay attention to correct seat of air duct (2).
1.2	Remove paneling (3)	Model 212.0 with engine 273 up to model year 2011
2	Loosen nut (5) and remove ground line (6) from negative terminal of on-board electrical system battery (G1)	Installation:  Ensure that the ground line (6) is seated tightly, otherwise the electrical system may be damaged.
3	Using a diode test lamp, check the electrical system for voltage between the positive line of the on-board electrical system battery (G1) and the disconnected ground line (6)	Vehicles with code (B03) ECO start-stop function If the diode test lamp lights up, the on-board electrical system is still active because of a defect in the electrical system. In this case the ground line of the additional battery should be disconnected. See: ↓ Remove/install additional battery
		Model 207	AR54.10-P-0007EC
		Model 212, 218 Cover positive lines, there is a risk of short circuit! The electrical system is to be repaired once the work to be carried out has been completed.	AR54.10-P-0007ES
4	Connect in the reverse order.